Model 3106B
Double-Ridged
Waveguide Horn
User Manual
ii |
ETS-Lindgren L.P. reserves the right to make changes to any product described
herein in order to improve function, design, or for any other reason. Nothing
contained herein shall constitute ETS-Lindgren L.P. assuming any liability
whatsoever arising out of the application or use of any product or circuit
described herein. ETS-Lindgren L.P. does not convey any license under its
patent rights or the rights of others.
© Copyright 2006–2008 by ETS-Lindgren L.P. All Rights Reserved. No part
of this document may be copied by any means without written permission
from ETS-Lindgren L.P.
Trademarks used in this document: The ETS-Lindgren logo is a trademark of
ETS-Lindgren L.P.
Revision Record | MANUAL, 3106B | Part #399785, Rev. B
Revision Description Date
A Initial Release September, 2006
B Added optional connectors
information; rebrand
November, 2008
| iii
Table of Contents
Notes, Cautions, and Warnings ................................................ v
1.0 Introduction .......................................................................... 7
Optional Components .................................................................................... 8
Connectors ............................................................................................ 8
Tripod Options ....................................................................................... 9
ETS-Lindgren Product Information Bulletin ................................................. 10
2.0 Maintenance ....................................................................... 11
Annual Calibration ....................................................................................... 11
Optional Parts .............................................................................................. 11
Service Procedures ..................................................................................... 11
3.0 Specifications ..................................................................... 13
Electrical Specifications ............................................................................... 13
Physical Specifications ................................................................................ 13
Power Rating ............................................................................................... 13
4.0 Mounting Instructions ....................................................... 15
Additional Mounting Options ........................................................................ 16
7-TR and Mast Mounting Options ........................................................ 16
2x2 Boom Mounting Options ............................................................... 17
5.0 Application ......................................................................... 19
6.0 Typical Data ........................................................................ 21
Model 3106B Typical Antenna Factor .......................................................... 21
Model 3106B Typical Gain ........................................................................... 22
Model 3106B Typical VSWR ....................................................................... 23
Model 3106B Typical Half-Power Beamwidth .............................................. 24
Model 3106B Typical Measured Radiation Patterns .................................... 25
400 MHz .............................................................................................. 25
800 MHz .............................................................................................. 26
1000 MHz ............................................................................................ 26
2000 MHz ............................................................................................ 27
Appendix A: Warranty ............................................................. 29
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| v
Notes, Cautions, and Warnings
Note: Denotes helpful information intended to
provide tips for better use of the product.
Caution: Denotes a hazard. Failure to follow
instructions could result in minor personal injury
and/or property damage. Included text gives proper
procedures.
Warning: Denotes a hazard. Failure to follow
instructions could result in SEVERE personal injury
and/or property damage. Included text gives proper
procedures.
See the ETS-Lindgren Product Information Bulletin for safety,
regulatory, and other product marking information.
vi |
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Introduction | 7
1.0 Introduction
The ETS-Lindgren Model 3106B Double-Ridged Waveguide Horn is a linearly
polarized broadband antenna covering a frequency range of 200 MHz to
2.5 GHz. The Model 3106B was designed and built specifically for EMI
measurements and specification compliance testing.
Although rated to 2.5 GHz, measured antenna factor (AF) values are supplied to
3 GHz. The Model 3106B can be used for radiated emissions (RE) testing to
3 GHz, provided that an attenuator is used at the feed to reduce the high VSWR
above 2.7 GHz.
The Model 3106B has high gain and excellent VSWR characteristics over its
entire frequency range. It is especially effective for generating high
electromagnetic fields with relatively low power input. The antenna is also useful
for receiving low level signals where high gain characteristics are needed.
The Model 3106B is precision machined from aluminum, making it lightweight
and durable. A 50 V Type N female connector is mounted on the base block of
the antenna, providing increased power handling.
Two brackets
are attached to
the sides of the
Model 3106B
so it can be
polarized either
horizontally or
vertically.
A variety of mounting options are available for the Model 3106B. For information,
see Mounting Instructions on page 15.
8 | Introduction
Optional Components
CONNECTORS
The standard Model 3106B provides a Type N connector. As an alternative, the
Model 3106B may be ordered with an SC connector or with a 7/16 DIN
connector.
Type N Connector (Standard)
SC Connector (Optional) 7/16 DIN Connector (Optional)
Introduction | 9
TRIPOD OPTIONS
ETS-Lindgren offers the following nonmetallic, non-reflective tripod for use at
both indoor and outdoor EMC test sites.
• 7-TR Tripod—Constructed of PVC and
fiberglass components, providing
increased stability for physically large
antennas. The unique design allows for
quick assembly, disassembly, and
convenient storage. Allows several
different configurations, including options
for manual or pneumatic polarization.
Quick height adjustment and locking
wheels provide ease of use during
testing. Maximum height is 2.17 m
(85.8 in), with a minimum height of .8 m
(31.8 in). This tripod can support a
13.5 kg (30 lb) load.
Model 3106B
shown mounted onto 7-TR
with 3106B centerline rotation boom
The following 7-TR booms are available for the Model 3106B:
• 109042 boom—Straight boom; for general antenna mounting on a
7-TR
• 106328 boom—Offset boom; for general antenna mounting on a
7-TR with pneumatic or manual polarization
• 108507 boom—Centerline rotation boom; when changing
polarization, maintains centerline rotation (for Model 3106B only)
10 | Introduction
ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren Product Information Bulletin included with your shipment
for the following:
• Warranty information
• Safety, regulatory, and other product marking information
• Steps to receive your shipment
• Steps to return a component for service
• ETS-Lindgren calibration service
• ETS-Lindgren contact information
Maintenance | 11
2.0 Maintenance
Before performing any maintenance, follow
the safety information in the ETS-Lindgren
Product Information Bulletin included with
your shipment.
WARRANTY
Maintenance of the Model 3106B is limited
to external components such as cables or
connectors.
If you have any questions concerning
maintenance, contact ETS-Lindgren
Customer Service.
Annual Calibration
See the Product Information Bulletin included with your shipment for information
on ETS-Lindgren calibration services.
Optional Parts
Following are the part numbers for ordering optional parts for the Model 3106B
Double-Ridged Waveguide Horn.
Part Description Part Number
7-TR Tripod, 3106 Mount, Pneumatic 7-TR/POL-3106
Boom Assembly, 3106 Antenna Mounting 108507
Service Procedures
For the steps to return a system or system component to ETS-Lindgren for
service, see the Product Information Bulletin included with your shipment.
12 | Maintenance
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Specifications | 13
3.0 Specifications
Electrical Specifications
Frequency Range: 200 MHz – 2.5 GHz
VSWR Ratio (Average): <1.6:1
Maximum Continuous Power: 800 W
Peak Power: 800 W
Impedance: 50 ς
Connector: Type N female
Front-to-Back Ratio: 20 dB
Cross Polarization: 20 dB minimum
Physical Specifications
Height: 72.9 cm (28.7 in)
Width: 93.3 cm (36.7 in)
Depth: 97.8 cm (38.5 in)
Weight: 11.8 kg (26.0 lb)
Power Rating
Type N Connector: < 300 MHz 1 kW
300 MHz–1 GHz 500 W
1 GHz–2 GHz 300 W
SC Connector: < 300 MHz 1 kW
300 MHz–1 GHz 500 W
1 GHz–2 GHz 300 W
7/16 DIN Connector: < 300 MHz 1.5 kW
300 MHz–1 GHz 750 W
1 GHz–2 GHz 500 W
14 | Specifications
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Mounting Instructions | 15
4.0 Mounting Instructions
Before connecting any components, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your
shipment.
Mount the antenna to an ETS-Lindgren 7-TR Tripod with a standard
1/4–20 mounting stud.
Model 3106B shown mounted onto 7-TR with 3106B centerline rotation boom
Due to the size of the Model 3106B, do not
mount the antenna onto a 4-TR tripod.
16 | Mounting Instructions
Additional Mounting Options
7-TR AND MAST MOUNTING OPTIONS
Following are additional options for mounting the Model 3106B onto a
7-TR tripod. Contact the ETS-Lindgren Sales Department for information on
ordering optional mounting hardware.
Mast refers to 2070 Series, 2075, and 2175 Antenna Towers.
See page 9 for a description of 7-TR booms available for the
Model 3106B.
Mounting Instructions | 17
2X2 BOOM MOUNTING OPTIONS
Following are additional options for mounting the Model 3106B onto a 2x2 boom.
Contact the ETS-Lindgren Sales Department for information on ordering optional
mounting hardware.
2x2 boom refers to a typical 2-inch by 2-inch boom.
18 | Mounting Instructions
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Application | 19
5.0 Application
Each Model 3106B Double-Ridged Waveguide Horn is individually calibrated
during the manufacturing process. Using the three-antenna method of calibration
per specification ARP-958, apparent gain at 1.0 meters from the end of the
antenna is determined and used to check conformance to the antenna
factor (AF).
The antenna factor should be used in specification compliance testing to convert
receiver reading (dBuV) to field intensity units (dBuV/m). The conversion is
accomplished by adding the antenna factor in dB to the receiver reading in dB
above 1 microvolt. To produce specific field strengths at 1-m spacings, use the
following equation:
()
E
Pg
d
V/m =
30
d = distance, in meters
g = numeric gain (10
G[dB]/10
)
P = antenna net input power, in watts
20 | Application
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